Soil Week 11

Matric Potential

Water absorbed to the surface of soil particles

Osmotic Potential

The concentration of dissolved solutes or salts in the soil which restricts the movement of water

Pressure Potential

Pressure allows water to do more work, flowing faster

Gravitational Potential

effect of gravity on the energy of water

What is the main driver of water movement in the xylem?

Transpiration

Hypertonic Solution

A solution that has a higher solute concentration than another solution

Isotonic Solution

A solution that has the same solute concentration as another solution

Hypotonic Solution

A solution that has a lower solute concentration than another solution

Diffusion

The movement of water from high to low concentration

Osmosis

The movement of water from low to high concentration

Simple Diffusion

Diffusion through the membrane from high to low concentration

Facilitated Diffusion

Diffusion through a protein channel from high to low concentration

Active Transport

The movement from low to high concentration through a pump with an energy requirement

Potential Energy

Energy that is stored but not used

Ψs cannot be

positive

When Ψtotal is ________ outside of cells, water moves into the cells and creates turgor pressure.

high

Gravitational Potential is always negative unless

The plant is 0 meters tall

Matric potential is always _____ zero

Less than or equal to

Ψs=

-iCRT

What percentage of our freshwater goes towards agriculture?

70%